| 摘要 |
PROBLEM TO BE SOLVED: To provide a voice input circuit which can take out a necessary frequency component, can make up a tone color fitting to the taste of the user in a simple structure by mixing with a signal not distorted by a resister, and can changed over the ON and the OFF of a distortion effect by a change-over switch in a single operation. SOLUTION: A first amplifier circuit 2 to amplify an input signal to a necessary level; a first filter circuit 3 to take out only a high-frequency component from the output; a second amplifier circuit 4 to amplify the component until it is clipped; a second filter circuit 5 to take out a distortion component from the output; attenuators 6, 7, 8, and 9 to regulate the mixing amount of the signal amplified by the first amplifier circuit 2, and the output of the second filter circuit 5; and a change-over switch 10 to carry out the ON and the OFF of the distortion effect; are provided. |
